[INFO] cloning repository https://github.com/silmeth/yarli
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/silmeth/yarli" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilmeth%2Fyarli", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilmeth%2Fyarli'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] deba8b83a42ef4d92fd3174ca91bd936bff9a730
[INFO] testing silmeth/yarli against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilmeth%2Fyarli" "/workspace/builds/worker-26/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-26/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/silmeth/yarli on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/silmeth/yarli
[INFO] finished tweaking git repo https://github.com/silmeth/yarli
[INFO] tweaked toml for git repo https://github.com/silmeth/yarli written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] crate git repo https://github.com/silmeth/yarli already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 548df9d5135731264e7a4952572f87d1e32d52d6778ce95d0dac831159285e4a
[INFO] running `Command { std: "docker" "start" "-a" "548df9d5135731264e7a4952572f87d1e32d52d6778ce95d0dac831159285e4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "548df9d5135731264e7a4952572f87d1e32d52d6778ce95d0dac831159285e4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "548df9d5135731264e7a4952572f87d1e32d52d6778ce95d0dac831159285e4a", kill_on_drop: false }`
[INFO] [stdout] 548df9d5135731264e7a4952572f87d1e32d52d6778ce95d0dac831159285e4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2536867041e0398d030be38229dc4bc0a96b6369c27813fbd8ac823cb5cf211
[INFO] running `Command { std: "docker" "start" "-a" "c2536867041e0398d030be38229dc4bc0a96b6369c27813fbd8ac823cb5cf211", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling yarli v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/ast.rs:96:17
[INFO] [stdout]    |
[INFO] [stdout] 96 |     Function(Rc<Callable>),
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 96 -     Function(Rc<Callable>),
[INFO] [stdout] 96 +     Function(Rc<dyn Callable>),
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/interpreter.rs:278:17
[INFO] [stdout]     |
[INFO] [stdout] 278 |     type C = Rc<Callable>;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 278 -     type C = Rc<Callable>;
[INFO] [stdout] 278 +     type C = Rc<dyn Callable>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/ast.rs:110:69
[INFO] [stdout]     |
[INFO] [stdout] 110 |             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout]     |                                                                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 110 -             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout] 110 +             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<dyn Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `globals`
[INFO] [stdout]   --> src/lox/interpreter.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     globals: EnvironmentCell,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_ast`
[INFO] [stdout]    --> src/lox/ast.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn print_ast(expr: &Expr) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parenthesize`
[INFO] [stdout]    --> src/lox/ast.rs:168:8
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn parenthesize(name: &str, exprs: &[&Expr]) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "c2536867041e0398d030be38229dc4bc0a96b6369c27813fbd8ac823cb5cf211", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2536867041e0398d030be38229dc4bc0a96b6369c27813fbd8ac823cb5cf211", kill_on_drop: false }`
[INFO] [stdout] c2536867041e0398d030be38229dc4bc0a96b6369c27813fbd8ac823cb5cf211
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b3bf2df4b6d2e266fe10b0b4dec6b4d575abf1948fe7d9fc1e76157d4fae391
[INFO] running `Command { std: "docker" "start" "-a" "2b3bf2df4b6d2e266fe10b0b4dec6b4d575abf1948fe7d9fc1e76157d4fae391", kill_on_drop: false }`
[INFO] [stderr]    Compiling yarli v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/ast.rs:96:17
[INFO] [stdout]    |
[INFO] [stdout] 96 |     Function(Rc<Callable>),
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 96 -     Function(Rc<Callable>),
[INFO] [stdout] 96 +     Function(Rc<dyn Callable>),
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/interpreter.rs:278:17
[INFO] [stdout]     |
[INFO] [stdout] 278 |     type C = Rc<Callable>;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 278 -     type C = Rc<Callable>;
[INFO] [stdout] 278 +     type C = Rc<dyn Callable>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/ast.rs:110:69
[INFO] [stdout]     |
[INFO] [stdout] 110 |             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout]     |                                                                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 110 -             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout] 110 +             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<dyn Callable>(lh.borrow(), rh.borrow()),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `globals`
[INFO] [stdout]   --> src/lox/interpreter.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     globals: EnvironmentCell,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_ast`
[INFO] [stdout]    --> src/lox/ast.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn print_ast(expr: &Expr) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parenthesize`
[INFO] [stdout]    --> src/lox/ast.rs:168:8
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn parenthesize(name: &str, exprs: &[&Expr]) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "2b3bf2df4b6d2e266fe10b0b4dec6b4d575abf1948fe7d9fc1e76157d4fae391", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b3bf2df4b6d2e266fe10b0b4dec6b4d575abf1948fe7d9fc1e76157d4fae391", kill_on_drop: false }`
[INFO] [stdout] 2b3bf2df4b6d2e266fe10b0b4dec6b4d575abf1948fe7d9fc1e76157d4fae391
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b90148d067735cebdb0ea5849f68f02799e446b08e8ab69ae7d963d5c9d5b9e1
[INFO] running `Command { std: "docker" "start" "-a" "b90148d067735cebdb0ea5849f68f02799e446b08e8ab69ae7d963d5c9d5b9e1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/ast.rs:96:17
[INFO] [stderr]    |
[INFO] [stderr] 96 |     Function(Rc<Callable>),
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 96 -     Function(Rc<Callable>),
[INFO] [stderr] 96 +     Function(Rc<dyn Callable>),
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lox/interpreter.rs:278:17
[INFO] [stderr]     |
[INFO] [stderr] 278 |     type C = Rc<Callable>;
[INFO] [stderr]     |                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 278 -     type C = Rc<Callable>;
[INFO] [stderr] 278 +     type C = Rc<dyn Callable>;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lox/ast.rs:110:69
[INFO] [stderr]     |
[INFO] [stderr] 110 |             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stderr]     |                                                                     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 110 -             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<Callable>(lh.borrow(), rh.borrow()),
[INFO] [stderr] 110 +             (Value::Function(lh), Value::Function(rh)) => ptr::eq::<dyn Callable>(lh.borrow(), rh.borrow()),
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `globals`
[INFO] [stderr]   --> src/lox/interpreter.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     globals: EnvironmentCell,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_ast`
[INFO] [stderr]    --> src/lox/ast.rs:145:12
[INFO] [stderr]     |
[INFO] [stderr] 145 |     pub fn print_ast(expr: &Expr) -> String {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parenthesize`
[INFO] [stderr]    --> src/lox/ast.rs:168:8
[INFO] [stderr]     |
[INFO] [stderr] 168 |     fn parenthesize(name: &str, exprs: &[&Expr]) -> String {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `yarli` (bin "yarli" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.50s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/yarli-a7fcf4bcd7240336)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b90148d067735cebdb0ea5849f68f02799e446b08e8ab69ae7d963d5c9d5b9e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b90148d067735cebdb0ea5849f68f02799e446b08e8ab69ae7d963d5c9d5b9e1", kill_on_drop: false }`
[INFO] [stdout] b90148d067735cebdb0ea5849f68f02799e446b08e8ab69ae7d963d5c9d5b9e1